[llvm] [DWARFLinkerParallel] Add support for -odr mode. (PR #68721)

[Jonas Devlieghere via llvm-commits]

JDevlieghere wrote:

Did we come up with a solution for determinism that doesn't depend on the generator? My understanding was that we're okay with taking a penalty in terms of performance, but does the code reflect this, or will the current version of this patch still generate non-deterministic results with other producers or older version of clang that don't have Michael's changes?

https://github.com/llvm/llvm-project/pull/68721